diff --git a/Bootloaders/HID/HostLoaderApp/hid_bootloader_cli.c b/Bootloaders/HID/HostLoaderApp/hid_bootloader_cli.c
index 6063e19811..c86b0da9c6 100644
--- a/Bootloaders/HID/HostLoaderApp/hid_bootloader_cli.c
+++ b/Bootloaders/HID/HostLoaderApp/hid_bootloader_cli.c
@@ -970,13 +970,9 @@ void parse_options(int argc, char **argv)
 			} else if (strncmp(arg, "-mmcu=", 6) == 0) {
 				arg += 6;
 
-				uint8_t valid_prefix = 0;
-
 				if (strncmp(arg, "at90usb", 7) == 0) {
-					valid_prefix = 1;
 					arg += 7;
 				} else if (strncmp(arg, "atmega", 6) == 0) {
-					valid_prefix = 1;
 					arg += 6;
 				} else {
 					die("Unknown MCU type\n");
diff --git a/LUFA/DoxygenPages/KnownIssues.txt b/LUFA/DoxygenPages/KnownIssues.txt
index 67da093c93..9b648144bb 100644
--- a/LUFA/DoxygenPages/KnownIssues.txt
+++ b/LUFA/DoxygenPages/KnownIssues.txt
@@ -27,6 +27,8 @@
   *    - DMA transfers to and from the USB controller are not yet implemented for this release.
   *    - The UC3C, UC3D and UC3L sub-families of UC3 are not currently supported by the library due to their
   *      altered USB controller design.
+  *    - The various \c CreateStream() functions for creating standard \c <stdio.h> compatible virtual file
+  *      streams are not available on the UC3 architecture, due to a lack of suitable library support.
   *  - Architecture Independant
   *    - The HID parser fails for array type elements that have a MIN and MAX usage applied; each element
   *      in the array will receive a unique incrementing usage from the MIN value, up to MAX.